Levo Gen 3 2023 Brose 2.2 Motor Crank & Case Sealing

[tjl5709]

Did a 2 year service on my 2023 Levo Expert. Checking suspension bearings and repacking them. To get to the main chain stay bearings I had to drop the motor, so it got a good cleaning. The motor runs great, but I wanted to address the gaps found on the motor drive crank axles. Its an area that allows water/dust into the bearings and clutches. Instead of shipping it to the motor guys, I figured I give it a go with some DIY exploration. I ordered some various x-rings to see if anything might fit. I found something that works perfect from what I can see. Once the crank arms were torqued, they just touched the seals and the gaps are sealed off. You can see how the drive side fit as I mounted w/o the spider. If you have a new unit still under warranty, these mount on w/o any modification. Put them on, and take them off as needed.

 

[RichMorr]

Did a 2 year service on my 2023 Levo Expert. Checking suspension bearings and repacking them. To get to the main chain stay bearings I had to drop the motor, so it got a good cleaning. The motor runs great, but I wanted to address the gaps found on the motor drive crank axles. Its an area that allows water/dust into the bearings and clutches. Instead of shipping it to the motor guys, I figured I give it a go with some DIY exploration. I ordered some various x-rings to see if anything might fit. I found something that works perfect from what I can see. Once the crank arms were torqued, they just touched the seals and the gaps are sealed off. You can see how the drive side fit as I mounted w/o the spider. If you have a new unit still under warranty, these mount on w/o any modification. Put them on, and take them off as needed.

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Awesome thanks, sounding like and idiot but what size are the ones which fit? Try to find X-Ring Seal in the UK

 

[Janisj]

Thanks for nice report. These x sealrings were implemented by Bearing man, and now you can buy them just easy online by various vendors:

Brose X-ring seals (pair)

X-ring seals to increase protection of Brose motors. Fit an external X-ring seal each side of the crankshaft to further stop the chance of any water ingress into the Brose motor. Price per pair of seals.

www.tiendamtb.com

Seal Upgrade for BROSE Drive C/S/T/TF

Rubber Seal Upgrade for BROSE . Seal set is suitable for drive units (C/S/T/TF) from 2014 and offers protection against the ingress of dirt and moisture.

www.elanusparts.com

Dichtungsupgrade für Brose Drive C/S/T/TF

Dieses Dichtungsset ist passend für alle Brose-Motoren ab BJ 2014 und bietet einen Schutz gegen das Eindringen von Schmutz und Feuchtigkeit.

ebike-doktor.de

Brose Motor Upgrade Service - eBike Motor Centre (Performance Line Bearings)

eBike Motor Centre is the official trusted partner of Specialized bikes, and is also the sister company of eMCB Ltd, who are the official Brose Warranty Service Centre for UK and Southern Ireland. At eBike Motor Centre we noticed the failure rates of the Brose motors has been widely reported and...

www.ebikemotorcentre.com

Your x ring looks way more beafier, the question- is it not too thick... The seal should be enough thick to protect the water ingress and enough thin to make almost no pressure on motor housing to avoid abrasive damage.

It is also important to fill the void space behin the seal with loads of Grease ( see picture in the last link) to keep water out.

 

[tjl5709]

Thanks for nice report. These x sealrings were implemented by Bearing man, and now you can buy them just easy online by various vendors:

Brose X-ring seals (pair)

X-ring seals to increase protection of Brose motors. Fit an external X-ring seal each side of the crankshaft to further stop the chance of any water ingress into the Brose motor. Price per pair of seals.

www.tiendamtb.com

Seal Upgrade for BROSE Drive C/S/T/TF

Rubber Seal Upgrade for BROSE . Seal set is suitable for drive units (C/S/T/TF) from 2014 and offers protection against the ingress of dirt and moisture.

www.elanusparts.com

Dichtungsupgrade für Brose Drive C/S/T/TF

Dieses Dichtungsset ist passend für alle Brose-Motoren ab BJ 2014 und bietet einen Schutz gegen das Eindringen von Schmutz und Feuchtigkeit.

ebike-doktor.de

Brose Motor Upgrade Service - eBike Motor Centre (Performance Line Bearings)

eBike Motor Centre is the official trusted partner of Specialized bikes, and is also the sister company of eMCB Ltd, who are the official Brose Warranty Service Centre for UK and Southern Ireland. At eBike Motor Centre we noticed the failure rates of the Brose motors has been widely reported and...

www.ebikemotorcentre.com

Your x ring looks way more beafier, the question- is it not too thick... The seal should be enough thick to protect the water ingress and enough thin to make almost no pressure on motor housing to avoid abrasive damage.

It is also important to fill the void space behin the seal with loads of Grease ( see picture in the last link) to keep water out.

The package pictured is the size I ended up going with. I started with a 1/8" CS (cross section), but when you torqued the crank arms it was too thick and you could feel the bind. The pictures showing the loose xring was actually the 1/8" CS size. The pictures showing the final assembly is the 3/32 size. The 3/32 CS was perfect as it only ingaged at the end of the torquing. When I lubed everythging up for final assembly, some grease barely squeezed out at the end. When you turn the crank, I could tell there was really no binding. For my assembly they are just large enough o fill the gap and cover the case void. I will update if I see anything after some rides. Just a side note for others, if you have the motor off, you can check the gaps between the crank arms by using hex keys to find the gap width. Just remove the spider and torque the arms back on. It is important to torque them fully, as it is surprising how much they move to close that gap. The 15/16" ID seems to be the right diameter for the drive shaft. I could not find anything in metric sizes in my search here. If push came to shove, you could get away with an o-ring. It does not have the sealing areas, but at least you minimize that gap and close off the case openning. For the people that ride in the really mucky stuff, I found you could also protect the seal between the chain ring and the case. Its not an issue were I ride, but if you are into heavy wet riding and get alot of build up between the spider/ring assembly and the case, I large o-ring w/ a 1/8" CS and an I.D of around 1 3/4" will sit and cover the gap between the case protrusion and the spider. There are shoulders on both sides that it can ride on and will close off that gap. It will ride just above the current motor seal in that area protecting it from the water and mud.